Question

Read the following passage from a short story:

"The afternoon light drained from the parlor, leaving Clara to navigate the worsening shadows with only the rhythmic, metallic bite of her shears. She worked with the grim devotion of a soldier fortifying a lost outpost, cutting through the heavy damask as if she could sever the family’s impending ruin along the chalked lines. To her brother, standing in the doorway, her silhouette against the window-frame suggested nothing so much as the Cumaean Sibyl, sorting through dry, fluttering leaves of destiny that the wind would soon disperse. Clara did not look up; she knew he was there, a silent spectator to her solitary siege. 'We must pack the silver,' she said, her voice dry as the linen. 'The bailiff arrives at dawn.' He made no move to assist her, paralyzed by the realization that their heritage was being measured and partitioned not in acres or histories, but in these quiet, domestic amputations. She was rewriting their chronicle in the negative space of the scraps that fell to the floor, each ribbon of fabric a discarded hour of their youth. In her hands, the mundane act of tailoring became an act of preservation and sacrifice, a silent liturgy performed at the altar of their pride."

In the third sentence ("To her brother... soon disperse"), the allusion to the Cumaean Sibyl primarily serves to do which of the following?